Hoisting device



(No Model.)

WELTER.

HOISTING DEVICE.

Patented May 5,1891.

' tutor/m4 Nrrn STATES HOISTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 451,716, dated May 5,1891.

Application filed January 27, 1891. Serial No. 379,291. (No model.)

To all whom, it may concern.-

Be it known that I, ISAAC CONRAD WELTER, a citizen of the United States,residing at Luzerne, in the county of Luzerne and State of Pennsylvania,have invented certain new and useful Improvements in Hoisting-Machines;

and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters of referencemarked thereon.

This invention relates to certain new and useful improvements inhoisting apparatus or devices to be employed in connection with anelevator for mines, designed primarily for use in a coal-shaft for thepurpose of taking coal from the veins to the top of the breaker.

The invention has for its objects, among others, to provide a device forautomatically controlling the hinged supports and for operating a latchthat holds the car to the platform of the elevator. I provide pivotedcamblocks, in the grooves of which the pin or projection on theelevator-car works, the said cam-blocks being connected with the hingedsupports. The wings are so arranged as to form a support for theelevator-car when it reaches the desired height.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which Figure 1 is a vertical cross-section throughthe apparatus, with parts broken away and parts in side elevation. Fig.2 is a vertical section through the line of Fig. 1, looking in thedirection of the arrow. Fig. 3 is a top plan with the guides or uprightsin cross-section and other parts broken away. Fig. 4 is a perspectiveview of the latch removed.

Like letters of reference indicate like parts throughout the severalviews.

Referring now to the details of the drawings by letter, A A designatethe uprights or supports, between which the elevator-platform B issuspended in any known way, being guided by said uprights and arrangedto be raised and lowered in any suitable manner; but as these featuresform no part of the present invention they have not been shown.

To any fixed support are pivoted the supports 0, pivoted on suitablepivots a and arranged to swing thereon at right angles to the uprightsA, being pivoted at their lower ends, as seen best in Fig. 1. Thesesupports are free to swing easily on their pivots and are under thecontrol of the cam-block soon to be described, and with which theyareconnected.

One of the doors is cut away at one upper corner, as seen at bin Fig. 2,for a purpose hereinafter made apparent.

D is a cam-block pivoted at c to a cross-bar or other support E upon thepost A said pivot being arranged near the lower end of the cam-block,which is triangular in shape, as seen from Fig. 1, and is formedupon itsinner face with the triangular groove or path d, (see also Fig. 1,) andparallel with and above the upper part of this path is another groove orpath 6, (shown also in Fig. 1,) communication between the two parallelpaths being provided by means of the pivoted switches F, arranged toopen in opposite directions, the one at the upper end of the pathdesigned to open upward and the other one designed to open downward, asshown by dotted lines in Fig. 1. Suitable springs should be provided toreturn the said switches to their normal position, which is closed, andhold them there after they have been opened in a manner hereinafter setforth.

The elevator-platform is strongly braced, and is supported from thetimber B, to which the hoisting-rope B is attached, as seen in Fig. 1,and projecting from the side of the elevator-car or some of its parts isa rod f, which is preferably provided with a roller g, as shown indotted lines in Fig. 3, which is designed to work in the groove of thecamblock, as indicated in said Fig. 3 and also in Fig. 1. I sometimespropose to employ two of these cam-blocks, one upon each side, in whichcase there will be two of these rods, or it may be a single rod extendedupon both sides, as may be deemed best; but as I consider thisarrangement simply a duplication connected with the cam-block by meansof rods or other analagous provisions g, as seen best in Fig. 1, onebeing connected with the cam-block below its pivot and the other abovethe same, as shown, so that the two doors or wings will besimultaneously moved in the same directionthat is, either inward oroutward-as will be readily understood and the advantage and necessity ofwhich will soon be seen. 7

The operation of this part of the invention will be readily understoodupon reference to Fig. 1. When the elevator-platform is at the bottom ofthe shaft, the doors or wings assume the position indicated by dottedlines in Fig. 1-the innermost ones. As the platform nears the top of theshaft the projecting rod f engages the trian gulargroove of the camblockat the lower end, as seen in Fig. 1, and as the elevator-car travelsupward the said rod, following the said path or groove, as indicated byarrows in Fig. 1, causes the camblock to turn on its pivot and as itturns the supports are thrown outward simultaneously into the positionin which they are shown in full lines in Fig. 1, at which time the rod fhas traveled the length of the inclined groove or path at the upper endof the cam-block, as indicated by arrows, and when it arrives at the endthereof, being unsupported, it falls into the vertical groove or path atthe other side of the cam-block, as indicated by arrows; but as soon asit does this the cam-block, owing to the preponderance of weight beingon the other side of its vertical line, falls slightly toward theright-hand side of Fig. 1, and the doors or wings, which in the meantimehad been moved into the position shown by the outermost dotted lines,are drawn in into the position shown by full lines, and the platformstops in its downward movement and is sup ported upon said supports. Thecar upon the platform is then unloaded, and when all is ready to descenda slight upward movement of the platform causes the rod f to engage theswitch F, which readily yields to the pressure thereon, as indicated bydotted lines in Fig. 1, and as soon as the rodf has passed the latch thelatter is thrown back into its closed position, and then the rod f hasto travel down the inclined path until it engages the switch Fat theother end, which readily yields downward and the rod f passes throughinto the downward groove of the cam-block, as indicated by arrows 111Fig. 1.

As the rod f travels along the upper path or groove, the cam-block istilted on its pivot in the opposite direction and the doors are thrownoutward to allow the platform to pass, and then are drawn inward.

Upon the elevator-platform I provide any suitable means for locking thecoal-car thereon during its movement of the platform up and down, andarrange means for automatically unlocking the same as the elevator-carreaches the top of the shaft.

I is the lever, which is designed to be connected with and operate thelocking device,

which may be of any of the known forms.

This lever is pivoted at i on a vertical pivot and works between stops jon the upper face of the platform, as seen in Fig. 3. It haspivotallyconnected therewith, beyond its pivot, a lateral rod J, which worksthrough aguide loop or staple 70, as seen in Fig. 3, and its outer end,which extends beyond the side of the platform, is turned at right anglesto its length as seen in Fig. 3 and at. This is actuated automaticallyby the movement of the elevatorcar as follows:

L is an arm pivoted near its lower end to a support M, and betweenitsends pivotally connected with the cam-block bya rod or link Z, asseen in Figs. 1 and This arm has a horizontal extension, as seen bestinFig. 4, which has an inclined upper face with a shoulder on extendinghorizontally and vertically, as seen best in said Fig. 4c.

N is a latch or gate pivoted to this exten sion and adapted to be heldnormally closed by aspringo, suitably arranged andconnected, as iscommon in the art. This arm L is arranged with its extension in the pathof the bent end of the arm or rod J, as seen in Fig. 3, and as theelevator ascends, the car having been locked and the rod J drawn in toits fullest extent, the bent end of the rod retains its innermostposition until after the rodf has traveled to the end of the bottomupper path 'or groove of the cam -block, but as it drops into the outervertical path, as above described, then the bent end of the rod Jtravels down the inclined face of the extension of the arm M and the rodJ and consequently the locking-lever to which it is attached is pulledout and the car thus unlocked. The pivoted gate or latch permits of theupward passage of the bent arm, as indicated in Fig.-

4 by dotted lines and in Fig. 2. Further movement of the cam-blockswings the arm M or latch out of the way, as shown in Fig. 1.

What I claim as new is 1. The combination, with the elevator-car and itsprojecting rod, of the hinged supports and cam-block pivoted near itslowerend and formed with path in which the rod works, as set forth.

2. The combination, with the elevator-car and its projecting rod, of thehinged supports and pivoted cam-block having paths and pivoted gates orswitches providing comm unication between the different paths, as setforth. 3. The combination, with the elevator-car and its projecting rod,of the pivoted camblock having separated paths with pivoted gates orswitches at the end of one path, and the pivoted supports connected withthe camblock, as set forth.

4. The combination, with the elevator-car and its projecting rod, of thepivoted camblock actuated by the said rod and the piv- I oted supportspivotally connected with the cam-block to swing simultaneously inopposite directions, as set forth.

5. The combination, with the elevator-car and the pivoted cam-blockadapted to be actuated thereby, of the locking-lever on theelevator-platform, the rod connected therewith and having bent end, andthe pivoted latch carried by a support connected with the cam-block andhaving inclined portion to engage the said rod, substantially asspecified.

6. The combination, with the elevator-car, the pivoted cam-block; andthe locking-lever and its rod, of the pivoted arm L, having inclinedupper face and pivoted latch and connected with the cam-block,substantially as specified.

